India Standard Time
UTC offset: UTC+05:30
Region: India
Example IANA zones: Asia/Kolkata, Europe/Dublin, Asia/Calcutta
IST Time Zone
IST can refer to multiple time zones. The most common are: India Standard Time (UTC+05:30), Irish Standard Time (UTC+01:00), Israel Standard Time (UTC+02:00).
Definition
IST is a time-zone abbreviation used in date/time schedules, travel, and software timestamps. Abbreviations can map to different regions and offsets, so they are less precise than IANA time zones.
For accurate conversion, use a specific zone like America/New_York or Europe/London instead of abbreviation-only input.
Offset and DST note
IST is highly ambiguous across regions. Use an IANA time zone for exact conversion.
Common offsets for IST: UTC+01:00, UTC+02:00, UTC+05:30.
Meanings
Irish Standard Time
UTC offset: UTC+01:00
Region: Ireland (summer)
Example IANA zones: Europe/Dublin, Asia/Calcutta, Asia/Jerusalem
Israel Standard Time
UTC offset: UTC+02:00
Region: Israel (standard season)
Example IANA zones: Asia/Jerusalem, Europe/Dublin, Asia/Calcutta
Convert IST
Related offset pages
Related IANA zones
Related abbreviations
Frequently asked questions
What does IST mean?
IST can refer to multiple time zones. The most common are: India Standard Time (UTC+05:30), Irish Standard Time (UTC+01:00), Israel Standard Time (UTC+02:00).
Is IST ambiguous?
IST can refer to multiple meanings depending on region. Use exact IANA zones for reliable conversion.
How do I convert IST to my local time?
Use the Time Zone Converter and select a specific city or IANA zone to avoid abbreviation ambiguity.